LG MG180C Service Manual page 98

7. CIRCUIT DIAGRAM
1 2
ANT_SW1 ANT_SW2
GSM850_EGSM RX L L
GSM850_EGSM TX L H
DCS/PCS RX H L
A
DCS/PCS TX H H
ANT501
ANT500
ANT502
R504
NA
ANT505
ANT503
C508 NA
C545
12p
L510
2.7nH
L502
NA
B
RF2.85V
FL500
DGM081
11 1
VDD GSM850_RX1
2
GSM850_RX2
15 3
CTRL1 GSM900_RX1
14 4
CTRL2 GSM900_RX2
C519
5
C GSM1800_RX1
1000p
9 6
GSM1800_RX2
GND1
13 7
GND2 GSM1900_RX1
16 8
GND3 GSM1900_RX2
18
GND4
19
GND5
20 12
GND6 GSM850_900_TX
10
GSM1800_1900_TX
ANT_SW2
ANT_SW1
D
VBAT
U502
1
VDD VOUT
2
GND
3
RF_EN CE
R1114N281D-TR-F
C533 C534
1000p 4.7u
E
1 2
LGIC(42)-A-5505-10:01
3 4 5
L500 8.2nH
C505
C507 C506
100p
1.8p
0.5p
L501 2.2nH
C512
C509
10nH
NA
100p
L508
C513 1.2p
L503 27nH
C514 1.2p
C517 1.2p
L504 33nH
C518 1.2p
C520 1.5p
L505 6.8nH
C522 1.5p
C524 1.2p
L506 6.8nH
C527 1.2p
RF2.85V
R517
RF2.85V
270K R516
22K
R518
5
680
4
NC TEMPSENSE
R519
C535 C536 C537 4.7K
NA 4.7u 1u
3 4
6 7
VBAT
C501 C502 C503
0.1u 47p 10p
C500
33u
GSM_OUT GSM_IN
8 7
VRAMP
6
GND23
32
U500
GND22 GND
31 5
GND21 RF3166
30
GND20 VBATT
29 4
GND19
28
GND18 TX_ENABLE
27 3
GND17
26
BAND_SELECT
2
DCS_PCS_OUT DCS_PCS_IN
9 1
RF2.85V
C516
0.1u
24 1
RFIAN SCLK
23 2
RFIAP _SEN
22 3
RFIEN SDIO
21 4
RFIEP U501 BQN
20 5
RFIDN SI4210 BQP
19 6
RFIDP BIN
18 7
RFIPN BIP
17 8
RFIPP XOUT
RFOH
RFOL
C525 C526
0.1u 0.1u
RF2.85V V_IO
AFC
Section
Designer
Checked
Approved
Iss. Notice No. Date Name
5
- 97 -
8 9
4dB Atten
RFOL
R501 24 R502
R500
0.1u
220
220
C504
R503
APC
0
PA_ON
PA_BAND
3dB Atten
RFOH
R508 R509
R507 100p
18 300 C510
300
TCXO_OUT
C542 C541
18p 8p R560
100
S_CLK
S_EN
R561
100
S_DATA
RXQN
RXQP
RXIN
RXIP
R511 560
TXQN
C521
390p
R512 560
TXQP
R513 560
TXIN
C523
390p
R514 560
TXIP
26MHz
PDNB
RF2.85V
X500 26MHz
R515
1 3
VCONT OUT TCXO_OUT
12K
C530
2 4
GND VCC 1000p
C532
C531
1000p
1uF
Date Sign & Name
MODEL MG180c
RICH
06/02/06
B.Y YANG
DRAWING
RF_AERO II
NAME
H.KANG
DRAWING
Ver_1.0
LG Electronics Inc.
NO.
LG Electronics Inc.
10
A
B
C
D
Sheet/
Sheets
5/5